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NTIS

01/01/1988

Collation

51 unnumbered pages ; 28 cm

Abstract

The report gives results of an evaluation of gas-to-cloth (G/C) ratios and a variety of fabrics in baghouses controlling particulate emissions from coal-fired industrial boilers. Procedures for increasing the G/C ratio were evaluated in a pulse-jet baghouse. A second baghouse of the same size, but with reverse-flush cleaning, was used to study several types of woven and felted fabrics. Typical of textile plant boiler operations, the baghouses were subjected to fluctuating load requirements and frequent dewpoint excursions. Under these conditions, it was found that off-line high energy pulse-jet cleaning was necessary for long term pressure drop stability at G/C ratios above 5. Cleaning energy was found to have a major effect on pressure drop performance, but cleaning frequency registered an insignificant effect within the 6 to 20 minute range studied. Among fabrics, a new combination felted fabric, composed of Teflon and glass, showed excellent performance and stability under a long bag life.